复制构造 map (const map& x); map (const map& x, const allocator_type& alloc); 移动构造 map (map&& x); map (map&& x, const allocator_type& alloc); 利用初始化列表构造 map (initializer_list<value_type> il, const key_compare&
13_map.insert( std::map::value_type(0,32.8) ); 14_map.insert( std::map::value_type(1,33.2) ); 15_map.insert( std::map::value_type(2,35.8) ); 16_map.insert( std::map::value_type(3,36.4) ); 17_map.insert( std::map::value_type(4,37.8) ); 18_map.insert( std::map:...
2333)); //3. m1.insert(map<int, int>::value_type(0, 12345)); //4. m1[3] = ...
或者, 单独一个函数,此函数专门用来查找value_type, 具体情况如下: QString strGlobal = "D"; bool TestFindValue(const std::map<int,QString>::value_type &pair) { if(pair.second.compare(strGlobal) == 0) return true; return false; } 调用的时候: std::map<int, QString>::iterator iter...
mapStudent.insert(map<int,string>::value_type(001, "student_one")); // 第三种 用"array"方式插入 mapStudent[123] = "student_first"; mapStudent[456] = "student_second"; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. ...
声明std::map常量是指在C++中定义一个常量的std::map容器。std::map是C++标准库中的关联容器之一,它提供了一种键值对的映射关系,其中的键是唯一的,而值可以重复。 声明std::map常量的语法如下: const std::map<key_type, value_type> map_name; ...
mapStudent.insert(map<int, string>::value_type (1, "student_one")); mapStudent.insert(map<int, string>::value_type (2, "student_two")); mapStudent.insert(map<int, string>::value_type (3, "student_three")); map<int, string>::iterator iter; ...
value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)), std::forward_as_tuple(std::forward<Args>(args)...)) 1-6)Ifvalue_typeis notEmplaceConstructibleintomapfrom the corresponding expression, the behavior is undefined. ...
value_compare compares objects of typevalue_type (class) Member functions (constructor) constructs themap (public member function) (destructor) destructs themap (public member function) operator= assigns values to the container (public member function) ...
map(std::from_range_t, R&&rg, constCompare&comp=Compare(), constAllocator&alloc=Allocator()); (12)(since C++23) (constexpr since C++26) template<container-compatible-range<value_type>R> map(std::from_range_t, R&&rg, constAllocator&alloc) ...